Reinforced heat-retaining stone for fireless cookers.



H. A. MOGORD. REINFORCED HEAT RETAINING STONE FOR PIRELESS GOOKERS.

' -APPLI G-A T .ION FILED we. 4; 1910.

1,034,268. Patented July so, 1912.

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APPLICATION FILED AUGA, 1910.

1,034,268 I Patented July 30,1912.

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HERBERT ARTHUR MCCORD, or CHICAGO, iLLINoIs.

REINFORCED HEAT-RETAINING STONE'FOR FIRELESS COOKERSi Specification of Letters Patent.

Patented July 30, 1912.

Application filed August 4, 1910. Serial No. 575,399.

To all whom it may concern Be it known that I, HERBERT ARTHUR MoGoRD, citizen of the United States, re-.

siding at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Reinforced Heat-Retaining Stones for Fireless Cookers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its special object to provide an improved form of metal reinforced soap stone for fireless cookers, and to this end the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a vertical section showing a fireless cooker illustrating my improved soap stone, socalled, applied therein; Fig. 2 is a view corresponding to Fig. 1 but with some parts broken away and with a soap stone applied in a different manner than in Fig. 1; Fig.

3 is a plan view of the improved soap stone and Fig. at is a transverse vertical section taken on the line w w of Fig. 3.

The numeral 1 indicates the body, and the numeral 2 the cover of a fireless cooker of ordinary construction, the same having an inner metallic lining 3. Loosely fitting within the cooking chamber of the fireless cooker, there is, as shown, two cooking pots, to-wit, the lower pot 4;, and the upper pot 5, both of which are, preferably, of quite thin sheet metal.

The soap stone 6 is, as shown, approximately round and is provided with one or more, as shown, two peripheral notches 7. The stone is reinforced and bound together by a quite heavy wire band or hoop S which fits the peripheral groove in the said stone and has its ends 8 twisted together within one of the notches 7. At several different, to-wit as shown, at three different points, combined spacing feet and arms are applied to the peripheral portlon of the stone 6. Each of these devices is formed from a single piece of wire which is bent to form horizontally extended approximately U shaped arms9, and vertically extended legs 10, that terminate in approximately U shaped bearing feet 11. The legs 10 fit in vertical peripheral grooves 12, of the stone 6, and are held against lateral movements by the wire binding hoop 8. The arm portions 9 bear against the upper face of the stone 6, projecting radially outward from the periphery thereof and are formed with downturned ends 13, seated in perforations ll, formedin the upper face of the stone 6. The bearing feet 11 have upturned ends that bear directly against the lower face of the stone at points inward of the peripheral grooves 12. In this way, as is evident, the combined bearing arms and feet are interlocked in the stone, and are so located that when the stone is placed in the bottom of the cooking chamber, as shown in Fig. 2, the feet 11 will rest on the bottom of the metal lining 3, while the arms 9, will engage the sides of the said lining and will afford bearings for the bottom of the pot 4. Thus the stone 6, is held out of direct contact with all of the metallic parts of the cooker and of the pot, and discoloring and defacing of such metal parts is thereby prevented. The metallic binder protects the stone against cracking and generally strengthens the same.

It is sometimes desirable to apply the stone in the mouth of one of the pots, as shown in Fig. 1, and when thus applied, the arms 9 are adapted to rest upon the top edge of the pot and properly support the stone.

To adapt the stone to be readily lifted by a suitable hook, a metallic key or eye bolt 15, of the split key type, is preferably applied to the center of the stone, as shown in the drawings. The prongs of this key are inserted through an axial perforation of the said stone and its lower ends are bent over into recesses formed in the bottom of the stone. The head, or eye, ,of the key is located within an axial depression 16, formed in the upper face of the stone at the axis thereof.

By the simple device above described, soap stones, or other stones for use in connection with tireless cookers and analogous devices are made much more durable and efficient, and this is accomplished at eX- tremely small cost.

The stone is described as a soap stone be cause this is the kind of stone generally employed for holding heat, but it will, of course, be understood that my invention is not limited to the kind of stone, but on the contrary, the stone maybe of any suitable kind, either natural or artificial.

What I-elaim is: l

1. A device of the kind described com-. prising a stone having a peripheral groove and notch, a multiplicity of wires bent to form combined spacing arms and legs applied'to theperipheral portion ofsaid stone, and reinforcing metal hoop engaging the periphery of said stone and holdlng said spacing devices interlocked to said stone, the said hoop having its ends secured together and located within the peripheral notch "of said stone, substantially as described.

2. The combination With a disk-like stone having a peripheral groove and notch, of a reinforcing wire hoop engaging said groove and having its ends twisted together and located within said notch, and a multiplicity of wires bent to form radially extended arms with ends seated in perforations in the face of said stone, and depending legs terminating in feet, the ends of which engage the other face of said stone, the said legs being seated in peripheral seats in said stone and being normally surrounded by said wire hoop, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

HERBERT ARTHUR MoCORD. Witnesses:

*DoNALD D. MILLIKIN, JOHN L. FALE.

Copies of this patent may be obtained for five cente -each, by addressing the Commissioner of Patents, Washington, D. Cl 

